Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...April 23, 2015

Science
1. A weatherman reports, "the storm waves are about 2 meters high and about 35 meters apart. "what properties of waves is the reporter describing? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof ...April 16, 2015

AP Physics
A racing car travels on a circular track of radius 220 m, moving with a constant linear speed of 48.9 m/s. Find its angular speed. Answer in units of rads/s. I already mutiplied 2π x 220. But I don't know what to do from there? Any help please? Thanks!April 8, 2015

Physics
Calculate the work done on the system when 1.00 mol of gas held behind a piston expands irriversibly from a volume of 10.0dm^3 against an external pressure of 1.00 bar?March 23, 2015

english
Revise the following word groups to remove all fragments and/or parallelism errors. I like baseball because it is fun and teaches me about the sport. My Answer I like baseball, it teaches me about the sport and its also fun.February 28, 2015

Economics
When a monopolist increases sales by one unit a)more low priced sales caused negative marginal b)every other unit must be sold at a lower price c)gains some revenue from selling the extra unit D)loses some revenue and all of the aboveFebruary 24, 2015

Physics
A 65.0 kg skier with an initial speed of 11.0 m/s coasts up a 2.50 m high rise as shown in Figure 6.23. Find his final speed at the top, given that the coefficient of friction between her skis and the snow is 0.0800.February 22, 2015

Math
A distressed ship is 10 miles south and 8 miles east of a coast guard station. a) What bearing should the coast guard boat take to reach the distressed ship? b)How many miles will the coast guard boat travel? c)If the coast guard boat is traveling 30 miles per hour, how long ...January 6, 2015

maths
the total revenue and the total profit functions (in Ringgit) of a product are given as follows: total revenue :R(x)= x^3-95-800x total profit: P(x)=1/3x^3+800x-120 where x is the number of units produced and sold. find the level of production in which the total cost is a ...January 4, 2015

maths
Sorry the full question is: If the third term of a of a geometric sequence is 7, and the 7th term is 16.807, what is the common ratio?January 3, 2015

Maths
if the third term of a geometric sequence is 7, what is the common ratio? would appreciate if u can show me the working. Thank youJanuary 3, 2015

Math
A tractor tire has a diameter of 6 feet and is revolving at a rate of 45 rpm. At t=0, a certain point is at height 0. Write an equation to describe the height of the point above the ground after t seconds. The answer is apparently d=-3cos(3pi/2)t +3 But I thought it's ...January 1, 2015

Math
A Ferris wheel makes 3 revolutions per minute. If the diameter is 20 feet, write an equation to describe the height off the ground of a particular seat after t seconds. I got d=10cos(6pi)t as the answer, is this correct?January 1, 2015

Math
A floating leaf bobs up and down a total of 8 cm. the leaf completes 3 complete cycles in 8 seconds. (Assume equilibrium at t=0.)Write an equation to model the simple harmonic motion. Can someone explain to me why the answer to this problem is d=4sin(3pi/4)t?December 27, 2014

Math
Will Rogers spun a lasso in a vertical cycle. The diameter of the loop was 6 feet, and the loop spun 50 times each minute. If the lowest point on the rope was 6 inches above the ground, write an equation to describe the height of this point above the ground after t seconds. ...December 27, 2014

Math
Find the amplitude, frequency, and distance when t=3 a. y=-15cos((pi*t)/3)+5 b. y=120sin100pi*t I think the amp for a. is 15, the freq is 3/2 cycles per unit of time, and the distance is 20, but I'm not totally sure if I'm approaching this problem correctly.December 25, 2014

English
No, I cannot. From what I see chapter 8 is mostly Pathos......except for when he talks how his grandmother was wronged. He is taking a stand for her.December 14, 2014

English
That he is worried and scared. More anxious than most slaves since he has fallen under the hands of a kinder master. Anxious about his fate which lies in the hands of the white brutes.December 14, 2014

English
Could I use from Chapter 8 of Frderick Douglass where they assault his broher as an ethos to show how they were cruel and or abusive?December 14, 2014

English
I REALLY need help finding a use of Ethos in "Narrative of The Life of Frederick Douglass, An American Slave", chapter 8. Do not know if I should use part where they treat his grandmother badly after serving master for such a long time.December 14, 2014

Intro Biology
I can't find examples in the book as reference. Please help me with these questions and explain why. 1.) Which of the following has no vascular tissue (plumbing system)? A) Conifer B) Angiosperm C) Fern D) Moss E) Ginkgo 2.) Which of the following ...November 25, 2014

Physics
Car 1 going northward (direction 90 degrees) at 14 m/s in an SUV weighing 2300 kg. car 2 going southwest (direction 225 degrees) at 16 m/s in a car that weighs 1600 kg. it is a completely inelastic collision. What is the direction and speed of the two vehicles immediately ...November 25, 2014

math
An art teacher has 1 1/2 pounds of red clay and 3/4 pound of yellow clay. The teacher mixes the red clay and yellow clay together. Each student in the class needs 1/8 pound of the clay mixture to finish the assigned art project for the class. How many students can get enough ...November 18, 2014

Thank Jiskha tutors
I really appreciate all that you tutors do for us, I know we may be a bit demanding sometimes XD but we really love how you guys are always there to help us out. Coming from experience, I've had some past teachers that aren't as willing to help us when we do not ...November 16, 2014

history essay please help!
The goal of the essay is to tell what caused a skyrocketing population from 100 years ago to now. Well, I don't think I ended the essay good, can you help me end it? How about this: Those are just a few of the reasons, but modern technology has certainly done a role in the...November 14, 2014

history essay please help!
How does the growth of the world's population today compare with its growth 100 years ago? Explain why the changes have taken place. My essay: Today's world population growth compared to the population growth 100 years ago is a big, big difference. The population has ...November 14, 2014

Math
Maggie makes some fruit punch. She mixes 2 1/2 quarts of grape juice with 1 1/2 quarts of orange juice. One quart of grape juice costs $1 less than one quart of orange juice. She finds that the total cost of making the fruit punch is $12.50. Calculate the cost of each quart of...November 4, 2014

Chemistry
In the combustion of natural gas according to the equation CH4 + 2 O2 -> CO2 +2 H20, how many grams of water are formed during the combustion of 0.264 mole of CH4?October 26, 2014

math asap
if a 40 m rope is cut into two pieces in the ratio 3 : 5, how long is each piece? i tried: x=one piece 3/5 = x/40 x= 3*40/5 x=120/5 x=24 is that right?October 23, 2014

math
If a 40 m rope is cut into two pieces in the ratio 3:5, how long is each piece? I tried it but I checked it and it was wrong, please help.October 23, 2014

Chemistry
That's okay, I'm just wondering how to calculate the pH's at each mL increment in order to create the graph.October 22, 2014

Chemistry
Plot the titration of a weak base with a strong acid. Show the titration curve using .106M NH3 and .225M HCl for a 50.00mL sample of the ammonia. No idea where to start here. I'm supposed to plot the curve from 2mL increments (0-30). Tip on homework: *Remember to use the ...October 22, 2014

Physics
1.) Let's say that an an orange is launched upward at 22m/s. What is the displacement 3.5s later? 2.) When a volcano erupts, big rocks have been measured to reach heights of 50km (50,000m) What would the initial velocity need to be in order to reach such heights (neglect ...October 15, 2014

Physics
Assume that the batter did not continue to swing the bat after the collision (no energy was added to the system). How fast was the bat moving after the collision? The ball mass .145kg, the bats mass is 1.1kg. And the balls velocity is 44.7m/s and the bats velocity prior to ...October 8, 2014

Science
The flask shown here contains 10.0 ml of HCl and a few drops of phenolphthalein indicator. The buret contains 30ml of 0.130M NaOH. What Volume of NaOH is needed to reach the end point of the titration? I've used m1v1=m2v2, (x)(10.0ml HCl) = (0.130 M/L NaOH) (0.03L) and ...September 28, 2014

Pre-Calc
1.) If you use the parent graph y=sqaureroot of x as a reference, how would you graph y=sqaureroot of x+2+5? a.) Move the parent graph two units to the right and then up five units. b.) Move the parent graph two units to the left and then up five units. c.) Move the parent ...September 26, 2014

Statistics
Are my answers correct? Thanks! 1.) Based on a survey of a few thousand people, a newspaper reporter wants to draw conclusions about how a countrys citizens in general feel about the war in Iraq. At this point, is the reporter mainly concerned with data production, ...September 15, 2014

Statistics
Are my answers correct? Thanks! 1.) Based on a survey of a few thousand people, a newspaper reporter wants to draw conclusions about how a countrys citizens in general feel about the war in Iraq. At this point, is the reporter mainly concerned with data production, ...September 15, 2014

PHYSICS
Three forces, A,B and C act in the same vertical plane from point O. Force A is 30N and acts horizontally to the left of O. Force B is 40N and acts vertically upwards. Determine force C and the direction in which it acts, if the forces are in equilibrium.September 14, 2014

chemistry
Express the rate of the reaction in terms of the change in concentration of each of the reactants and products. 2D(g)+3E(g)+F(g)>>>>2G(g) + H(g) when D is decreasing at 0.30 MOL/Ls, how fast is (H) increasing?September 8, 2014

trigonometry
how fast is a toy car moving in ft/min if it makes 20 laps in one minute on a circular track of radius 3 feet ? ( i need to know how to set this problem up)August 31, 2014

Algebra 2
The shape of a park can be modeled by a circle with the equation x^2 + y^2 = 1600. A stretch of highway near the park is modeled by the equation y = 1/40(x - 40)^2. At what points does a car on the highway enter or exit the park? I am soooooo lost!May 22, 2014

Physics
A 3.0 kg block is moved up a 37 degree incline under a constant horizontal force of 40.0 N. The coefficient of friction is 0.10 and the block is displaced 2.0 m up the incline. Calculate the change in the kinetic energy of the block.May 7, 2014

Physics
A 3.0 kg block is moved up a 37 incline under a constant horizontal force of 40.0 N. The coefficient of friction is 0.10 and the block is displaced 2.0 m up the incline. Calculate the change in the kinetic energy of the block.May 7, 2014

Chemistry
Not the value, the equilibrium constant. DrBob222, there's no instance of the letter "K" except in your own statementMay 5, 2014

math
count by eigths to create a number line for the data that starts at 1 and ends at 3.April 24, 2014

Chemistry
When given the equation 2Na+Cl2=2NaCl. How many liters of Cl2 will it take to react completely with 63.0 grams of Na?April 16, 2014

algebra
a data set has the following points (0,2) (4,1) (6,0) the slope of the linear regression line is -0.32April 15, 2014

Computers
Need help creating pseudocode for the following. Registration workers at a conference for authors of children's books have collected data about conference participants, including the number of books each author has written and the target age of their readers. The ...April 8, 2014

PROGRAMMING
design a program for the following. Registration workers at a conference for authors of children's book have collected data about conference participants, including the number of book each author has written and the target age of their readers. The participants have ...April 8, 2014

Chemistry
A molecular compound has the empirical formula CH2. When 100mg of the compound is dissolved in 1.00 g of benzene, the solution freezes 1.75 degrees celsius lower than pure benzene. The Kf for benzene is 4.90 C/m. What is the MM of the compound?February 26, 2014

Math
An open rectangular tank (no top) with volume 11 cubic meters has a square base. The base has side x m. Write an equation for the surface area of the tank as a function of the length x. Surface Area = ? b. The base costs 1.1 cents/square m and the sides cost 1.6 cents/square m...February 17, 2014

Math
Consider the function f(x) = -2 x^3 + 36 x^2 - 162 x + 2. There are two critical points, A and B where A < B: A = and B = f''(A)= f''(B)= Therefore f(x) has a relative at A (MAX or MIN) and a relative at B (MAX or MIN).February 17, 2014

algebra 1
when three times the distance to he finish line is increased by 5km, the total kilometers covered in the race will be between 50 and 89 kmFebruary 11, 2014

Finance
Steve's ski shop has a net income of $389,000 with total sales of $2.5 million. Currently, the shop has debt of $500,000, equity of $800,000; receivables are 1.5 percent of sale, and Average total assets of $2,000,000. What is the Return on Equity? (Use the DuPont Identity)February 9, 2014

Geometry
Jason wants to walk the shortest distance to get from the parking lot to the beach. a.How far is the spot on the beach from the parking lot? b. How far will he have to walk from the parking lot to get to the refreshment stand?February 1, 2014